Vector¶

Vector is base class of other vector like classes. It represents a series of vectors.

In [1]:
from py3d import Vector
Vector()
Out[1]:
Vector([], dtype=float64)
In [3]:
Vector([0, 0, 0, 0])
Out[3]:
Vector([0, 0, 0, 0])
In [5]:
Vector([1, 2, -4])
Out[5]:
Vector([ 1,  2, -4])
In [7]:
Vector([1, 2, 3], (2,))
Out[7]:
Vector([[1, 2, 3],
        [1, 2, 3]])
In [9]:
import py3d
py3d.Vector([1, 2, 0, 3], ())
Out[9]:
Vector([1, 2, 0, 3])
In [10]:
Vector([1], (2,))
Out[10]:
Vector([[1],
        [1]])
In [12]:
V32 = Vector([
    [1, 3],
    [2, -9],
    [0.1, -3]])
V32
Out[12]:
Vector([[ 1. ,  3. ],
        [ 2. , -9. ],
        [ 0.1, -3. ]])

Get unit vector

In [13]:
V32.U
Out[13]:
Vector([[ 0.31622777,  0.9486833 ],
        [ 0.21693046, -0.97618706],
        [ 0.03331483, -0.99944491]])

Get length of vectors

In [14]:
V32.L
Out[14]:
array([[3.16227766],
       [9.21954446],
       [3.0016662 ]])
In [16]:
from numpy import allclose
assert allclose(V32.U.L, [[1], [1], [1]])

Get homogeneous vector

In [17]:
V32.H
Out[17]:
Vector([[ 1. ,  3. ,  1. ],
        [ 2. , -9. ,  1. ],
        [ 0.1, -3. ,  1. ]])

Get a series of random vectors

In [19]:
import py3d
py3d.Vector.Rand(2,3,4)
Out[19]:
Vector([[[0.40513239, 0.02143031, 0.145801  , 0.34835784],
         [0.21769041, 0.68040944, 0.67624686, 0.14796583],
         [0.23256034, 0.79461229, 0.37979845, 0.83797518]],

        [[0.22247825, 0.68053006, 0.43359095, 0.4887197 ],
         [0.92429732, 0.72410922, 0.28026668, 0.23847151],
         [0.76083391, 0.78686964, 0.44091347, 0.03738141]]])
In [21]:
import py3d
py3d.Vector([[0,0],[1,2],[3,4]]).diff()
Out[21]:
Vector([[1, 2],
        [2, 2]])

Read pcd file

In [23]:
import py3d
py3d.read_pcd("py3d/doc/ascii.pcd").xyz.as_point()
Out[23]:
In [24]:
import py3d
pcd = py3d.read_pcd("py3d/doc/binary.pcd")
pcd.xyz.as_point()
Out[24]:
In [25]:
pcd.to_pcd("test.pcd")